Can I use an underscore in a password on iOS and Windows?

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louis-j Author

Level 1

8 points

Can I use an underscore in a password on iOS and Windows?

issue: van you use an underscore in a password? Or is this different in IOS and Windows?

[Re-Titled by Moderator]

Original Title: Underscore in password

iPad Air, iPadOS 26

Posted on Oct 3, 2026 10:26 AM

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Answer 1

TheLittles

Level 10

210,193 points

Oct 3, 2026 7:15 PM in response to louis-j

"Can I use an underscore in a password on iOS and Windows?: issue: van you use an underscore in a password? Or is this different in IOS and Windows?"

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Password for what? What happens when you try it? If it works, it works.

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Answer 2

Oct 4, 2026 11:05 AM in response to louis-j

Use of “non-standard” characters might cause unanticipated issues which are not immediately obvious.

Feel free to experiment …

… but if you depend on reliable operation across multiple devices, hardware platforms, AND the cloud …

… is the “usual” character set really not sufficient ?

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